Illinois' 12th Congressional District: Map, Representative, Demographics

Current district lines U.S. Census Bureau TIGER/Line ↗

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Your representatives

Mike Bost

Mike Bost

Republican

Representative since Jan 6, 2015

Raised $1,327,225 · Cash on hand $789,999 (2026 cycle) · FEC filing ↗ · Through Jun 30, 2026

Full profile →

How Mike Bost voted

DateMeasurePositionChamber result
9/16/26
House
Retire through Ownership Act
On Motion to Suspend the Rules and Pass Suspension of the rulesA fast-track House procedure, usually for measures expected to have broad support. Debate is limited to 40 minutes, no amendments can be offered, and it needs a two-thirds vote of members voting — not a simple majority. A yes vote passes the bill.Rules of the House, Rule XV, clause 1 ↗
Passage
Yea
Passed
9/16/26
House
Water Resources Development Act of 2026
On Motion to Suspend the Rules and Pass, as Amended Suspension of the rulesA fast-track House procedure, usually for measures expected to have broad support. Debate is limited to 40 minutes, no amendments can be offered, and it needs a two-thirds vote of members voting — not a simple majority. A yes vote passes the bill. “As amended” means changes written into the motion itself are included.Rules of the House, Rule XV, clause 1 ↗
Passage
Yea
Passed
9/16/26
House
Ratepayer Protection Act
On Motion to Suspend the Rules and Pass, as Amended Suspension of the rulesA fast-track House procedure, usually for measures expected to have broad support. Debate is limited to 40 minutes, no amendments can be offered, and it needs a two-thirds vote of members voting — not a simple majority. A yes vote passes the bill. “As amended” means changes written into the motion itself are included.Rules of the House, Rule XV, clause 1 ↗
Passage
Yea
Passed
9/16/26
House
Providing for congressional disapproval under chapter 8 of title 5, United States Code, of the rule issued by the Environmental Protection Agency relating to the "California State Nonroad Engine Pollution Control Standards; Commercial Harbor Craft Regulations; Notice of Decision".
On Passage PassageThe vote on whether this chamber approves the measure — usually by a simple majority of those voting. It becomes law only once both chambers pass the same text and the president signs it, or Congress overrides a veto.House: The Legislative Process ↗
Passage
Yea
Passed
9/16/26
House
PROOF Act
On Passage PassageThe vote on whether this chamber approves the measure — usually by a simple majority of those voting. It becomes law only once both chambers pass the same text and the president signs it, or Congress overrides a veto.House: The Legislative Process ↗
Passage
Yea
Passed

See full voting record →

2026 elections

Election day is Tuesday, Nov. 3, 2026.

Past results

2022 general election

CandidatePartyVotesPercent
Mike BostWinnerR218,37975.00%
Homer "Chip" MarkelD72,79125.00%
Nancy FosterWrite-in10.00%

FEC ↗

2020 general election

Held under different district lines
CandidatePartyVotesPercent
Mike BostWinnerR194,83960.43%
Raymond C. LenziD127,57739.57%

FEC ↗

Demographics

MeasureThis districtIllinoisUnited States
Population745,90112,710,158340,110,990
Median age (years)42.039.439.2
Median household income$70,903$83,211$81,604
Below poverty level12.3%11.6%12.1%
Bachelor's degree or higher (age 25+)24.4%39.2%36.8%
Race and ethnicity
Hispanic or Latino (of any race)2.9%19.4%20.0%
Not Hispanic or Latino
White alone86.4%57.1%56.3%
Black or African American alone5.3%12.9%11.7%
Asian alone1.0%6.3%6.2%
American Indian and Alaska Native alone, Native Hawaiian and Other Pacific Islander alone, Some Other Race alone, Two or More Races4.4%4.2%5.8%
Foreign-born2.0%15.4%14.8%
Veterans (civilian adults 18+)8.0%4.5%5.9%

Census estimates. American Community Survey 2024 1-year, Data Profile ↗